1968075751 has 2 divisors, whose sum is σ = 1968075752. Its totient is φ = 1968075750.

The previous prime is 1968075743. The next prime is 1968075773. The reversal of 1968075751 is 1575708691.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968075751 - 2³ = 1968075743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1968075695 and 1968075704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968075721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984037875 + 984037876.

It is an arithmetic number, because the mean of its divisors is an integer number (984037876).

Almost surely, 2^1968075751 is an apocalyptic number.

1968075751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968075751 is an equidigital number, since it uses as much as digits as its factorization.

1968075751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 49.

The square root of 1968075751 is about 44362.9997971282. Note that the first 3 decimals coincide. The cubic root of 1968075751 is about 1253.1813896852.

The spelling of 1968075751 in words is "one billion, nine hundred sixty-eight million, seventy-five thousand, seven hundred fifty-one".